http://articles.mercola.com/sites/articles/archive/2006/09/12/the-simple-inexpensive-cure-for-afternoon-drowsiness-confirmed.aspxIt is known that ambient light can influence aspects of human physiology including brain function, circadian rhythm, heart rate, and hormone release. But most studies of this have focused on the effects of light during the night -- few have examined theenCommunityServer 2008.5 SP1 (Build: 31106.3070)